4-Bromo-2-furaldehyde
4-Bromo-2-furaldehyde (CAS: 21921-76-6; Formula: C5H3BrO2) is a furan derivative and organic building block with a molecular weight of 174.98 g/mol. This compound serves as a key intermediate in organic synthesis, particularly for the construction of more complex heterocyclic compounds. It is typically supplied at a minimum purity of 97%.
- IUPAC
- 4-Bromofuran-2-carboxaldehyde

Synthesis of Furanyl Cyclobutenediones
4-Bromo-2-furaldehyde is utilised as a building block for synthesising novel furanyl cyclobutenediones. These derivatives have shown potential as G-protein coupled receptor antagonists in research settings.
Heterocyclic Chemistry Intermediate
As a halogenated furan derivative, this compound is valuable in heterocyclic chemistry for introducing the furan moiety into larger molecular structures. It enables the creation of diverse organic molecules.
Research and Development
This chemical is suitable for use in academic and industrial research laboratories. Its reactive aldehyde and bromo-furan functionalities make it a versatile starting material for exploratory synthesis.
| Molecular weight | 174.98 |
|---|---|
| Empirical formula | C5H3BrO2 |
| Assay | 97% |
| Storage temperature | 2-8°C |
| Application | Building block for the synthesis of furanyl cyclobutenediones, potent G-protein coupled receptor antagonists.1 |
| Melting point | 54-58 °C |

Hazard statements
- H302Harmful if swallowed
- H315Causes skin irritation
- H317May cause an allergic skin reaction
- H319Causes serious eye irritation
- H335May cause respiratory irritation
Precautionary statements
- P261Avoid breathing dust, fume, gas or vapours
- P280Wear protective gloves, clothing and eye/face protection
- P305IF IN EYES
| Protective equipment | dust mask type N95 (US), Eyeshields, Faceshields, Gloves |
|---|---|
| Flash point | >110 °C / >230 °F |
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | Xn |
| Risk statements (R) | 22-36/37/38-43 |
| Safety statements (S) | 26-28-36/37/39 |
Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.
Documentation
Every batch ships with a Certificate of Analysis covering assay, identity and purity; the grade is confirmed against your enquiry. Safety Data Sheets and technical data sheets are available on request.
Supply & logistics
Samples for technical evaluation; bulk MOQ by grade and packaging. In-stock material ships in 7–10 working days, worldwide, with full export documentation.
What is 4-Bromo-2-furaldehyde used for?
+
4-Bromo-2-furaldehyde is used as a building block in the synthesis of furanyl cyclobutenediones, which are investigated as G-protein coupled receptor antagonists. It is also employed as an intermediate in general heterocyclic chemistry research.
What is the CAS number and molecular formula?
+
The CAS number for 4-Bromo-2-furaldehyde is 21921-76-6, and its molecular formula is C5H3BrO2.
What grade and purity does Tech Serve Solutions supply?
+
Tech Serve Solutions supplies 4-Bromo-2-furaldehyde with a minimum assay of 97%. We do not represent this product as USP, BP, or EP grade.
How should 4-Bromo-2-furaldehyde be handled safely?
+
4-Bromo-2-furaldehyde is a Warning substance (GHS07) that may cause harm if swallowed (H302), skin irritation (H315), allergic skin reaction (H317), serious eye irritation (H319), and respiratory irritation (H335). Appropriate personal protective equipment, including a dust mask (N95), eyeshields, face shields, and gloves, should be used. Handle in a well-ventilated area.
How is 4-Bromo-2-furaldehyde packed, shipped, and exported?
+
4-Bromo-2-furaldehyde is typically stored at 2-8°C. Tech Serve Solutions is a specialist global supplier and exporter of fine chemicals and laboratory reagents.
How can I request a sample or quote?
+
Please contact our sales team via the website or by telephone to request a sample or a quotation for 4-Bromo-2-furaldehyde.
▶ Related products

1-(2-Fluorobenzyl)piperazine
C11H15FN2
Chemical Synthesis
1-(2-Fluorophenyl)biguanide hydrochloride
Chemical Synthesis

1-(2-Fluorophenyl)cyclopropanecarboxylic acid
C10H9FO2
Chemical Synthesis
1-(2-Fluorophenyl)piperazine
C10H13FN2
Chemical Synthesis
1-(2-Fluorophenyl)piperazine monohydrochloride
C10H13FN2 · HCl
Chemical Synthesis
1-(2-Furoyl)-1H-benzotriazole
C11H7N3O2
Chemical Synthesis
1-(2-Furoyl)piperazine
C9H12N2O2
Chemical Synthesis
1-(2-Hydroxy-5-methylphenyl)-3-phenyl-1,3-propanedione
Chemical Synthesis
▶ Explore more

3-Methyl-1,5-di-p-tolyl-1,4-pentazadiene
Chemical Synthesis

3-Methyl-1,5-pentanediol
Chemical Synthesis

3-Methyl-1-(2-methylphenyl)-1H-pyrazol-5-amine
C11H13N3
Chemical Synthesis
3-Methyl-1-(3′-sulfoamidophenyl)-5-pyrazolone
C10H11N3O3S
Chemical Synthesis